Pep Guardiola once headed to the Etihad with Bayern Munich and plotted Manchester City's downfall - now it is very much roles reversed.
The Catalan, almost 10 years ago, observed as his team played perfectly in his image, dominating proceedings on the pitch. They would leave their opponents chasing shadows as his possession-based system led to one of the finest displays of his managerial career.
City were on the receiving end as Bayern, who'd then only been coached by Guardiola for a matter of months, proved that their manager's methods were universal amid doubters who felt he benefitted excessively from the likes of Lionel Messi, Xavi and co during his Barcelona tenure.